Reasons for the high stability of nano-structured (La,Sr)MnO3 infiltrated Y2O3-ZrO2 composite oxygen electrodes of solid oxide electrolysis cells

被引：48
作者：
Chen, Kongfa
Ai, Na
Jiang, San Ping [1 ]
机构：
[1] Curtin Univ Technol, Fuels & Energy Technol Inst, Perth, WA 6102, Australia
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 19卷
基金：
中国国家自然科学基金; 澳大利亚研究理事会;
关键词：
Solid oxide electrolysis cells; Nano-structure; Infiltrated LSM-YSZ oxygen electrode; Lattice shrinkage; Stability; FUEL-CELLS; PERFORMANCE; POLARIZATION; MECHANISM; CATHODES; ENERGY; (LA0.75SR0.25)(0.95)MNO3; DEGRADATION; ZIRCONIA; BEHAVIOR;
D O I：
10.1016/j.elecom.2012.03.033
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Nano-structured (La,Sr)MnO3 infiltrated Y2O3-ZrO2 (LSM-YSZ) oxygen electrodes show excellent activity and performance stability under solid oxide electrolysis cells (SOECs) operation conditions. LSM-YSZ composite electrodes are prepared by infiltrating pre-sintered YSZ scaffold with LSM nitrate solution, followed by heat-treatment at 900 or 1100 degrees C. The electrodes heat-treated at 900 degrees C exhibit an electrode polarization resistance as low as 0.21 Omega cm(2) at 800 degrees C and are relatively stable under electrolysis operation at 500 mA cm(-2) for 100 h, while the electrodes heat-treated at 1100 degrees C show the increased stability with the electrolysis polarization. The results clearly indicate that LSM lattice shrinkage under anodic electrolysis conditions inhibits the agglomeration and grain growth of infiltrated LSM nanoparticles, leading to the highly stable nano-structured LSM-YSZ electrode structure. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：119 / 122
页数：4
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